The first segment, %E3%82%AB%E3%83%AA%E3%83%93%E3%82%A2%E3%83%B3%E3%82%B3%E3%83%A0 , is a classic example of (also known as URL encoding). This system is used to represent non-ASCII characters in URLs, which originally were designed to support only a limited set of US-ASCII characters.
This seems to be a specific content identifier, likely from a video or image hosting site, given the structure of the string. Here's a general piece of advice on handling such content: The first segment